Article
Chemistry, Physical
Meiling Lei, Jing Sun, Yu Chen, Zixian Cai, Yimin Hu
Summary: This study investigates the effects of hydrotalcite concentration and alkyl chain length of [C(16)imC(n)]Br on the properties and lubricant performance of [C(16)imC(n)]Br/hydrotalcite hexagonal LLCs. The incorporation of hydrotalcite into hexagonal LLCs increases interlayer distances and viscoelasticity gradually. However, the friction coefficient and wear volume decrease initially and then increase with the increase of hydrotalcite content. Longer alkyl chain length of [C(16)imC(n)]Br leads to increased viscoelasticity, interlayer distance, and water permeability, which reduces the friction coefficient and wear volume at moderate hydrotalcite content. The improvement in lubrication performance is attributed to the formation of a tribofilm through physical adsorption and tribochemical reaction of [C(16)imC(n)]Br/hydrotalcite LLCs on the steel surface.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Multidisciplinary
Chloe Herrle, Sylvestre Toumieux, Maryne Araujo, Aurelien Peru, Florent Allais, Anne Wadouachi
Summary: In this study, a mechanochemical strategy was developed to synthesize a series of new bio-based surfactants under solventless conditions. A high overall yield of sulfated derivatives was obtained from renewable resources via a reaction and sulfation process.
Article
Polymer Science
Vivekanandan Sangeetha, Noel Jacob Kaleekkal, Saravanamuthu Vigneswaran
Summary: This study fabricated PVDF-co-HFP nanofibrous membranes with re-entrant architecture and enhanced hydrophobicity/omniphobicity using coaxial electrospinning technology. The membranes showed stable water recovery from hypersaline wastewater and excellent resistance to wetting.
Article
Chemistry, Physical
Lavkesh Kumar Singh Tanwar, Manoj Kumar Banjare, Srishti Sharma, Kallol K. Ghosh
Summary: The effect of [Dmim][BF4] on micellization of anionic surfactants SDS and LDS was studied using surface tension and conductivity techniques, and various physical and chemical parameters were determined. Additionally, fluorescence measurement was used to analyze the aggregation behavior of micellar solutions.
CHEMICAL PHYSICS LETTERS
(2021)
Article
Green & Sustainable Science & Technology
Louise Renault, Remi Marchal, Boris Le Guennic, Xavier Roussel, Pierre-Yves Divet, Thierry Benvegnu
Summary: A series of novel anionic furanic surfactants with lipophilic chains are prepared through a series of reactions, showing good surface activity and foaming properties, as well as excellent biodegradability and lack of aquatic ecotoxicity.
ADVANCED SUSTAINABLE SYSTEMS
(2021)
Article
Chemistry, Multidisciplinary
Trisha Banik, Krishna P. Kaliappan
Summary: The research presents a method using CuCN to directly convert 2'-haloacetophenones into 3-methyleneisoindolin-1-one scaffolds, with a broad substrate scope. It also demonstrates the potential of this method in synthesizing three special scaffolds analogous to various bio-active drugs.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Yimin Hu, Yu Chen, Zixian Cai, Xiaolan Jin, Lei Fan, Jie Han, Rong Guo
Summary: The effect of the hydrocarbon chain length of ionic liquid surfactants on the aggregation behavior with polyoxyethylene lauryl ether in aqueous solution was studied. The results showed that the chain length had a significant impact on the micelle structure.
Article
Chemistry, Organic
Nutthanicha Ketsomboon, Rungnapha Saeeng, Klaokwan Srisook, Uthaiwan Sirion
Summary: This study introduces a convenient method for the one-pot synthesis of long alkyl-chain triazolylglycosides using ionic liquid as dual promoter and solvent. The approach involves a sequential one-pot two-step glycosidation-CuAAc click reaction to achieve products in moderate to high yields, and successfully prepares non-ionic monocatenary triazolylglycoside surfactants with excellent yields, which were further evaluated for their cytotoxic activity.
TETRAHEDRON LETTERS
(2021)
Article
Chemistry, Physical
Patrick Denk, Asmae El Maangar, Jyotsana Lal, David Kleber, Thomas Zemb, Werner Kunz
Summary: The surfactant Akypo LF2 and its salts show significant steric constraints and electrostatic interactions when forming micelles. Experimental results indicate the formation of spherical micelles and highly stabilized aggregates at very high concentrations. The random distribution of negative charges in the headgroups, absence of lyotropic liquid crystalline phases, and extreme shift in cloud-point temperature and composition were observed.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Yunhui Wang, Louise Renault, Jean-Paul Guegan, Thierry Benvegnu
Summary: A new type of agaran-derived non-ionic surfactants were prepared by transforming agarose into anhydro L- and D-galactose acetal monomers and dimers with alkyl chains, followed by characterization and investigation of their surface activities, showing low superficial tensions and interfacial tensions.
Article
Chemistry, Multidisciplinary
Roberta A. Kehoe, Mark E. Light, David J. Jones, Gerard P. McGlacken
Summary: One-pot processes offer an environmentally friendly and time-saving approach to building complex molecules. This study presents a phosphine-free, inorganic base free, multi-step, one-pot reaction sequence for the rapid synthesis of complex medicinally relevant heterocycles. The approach combines three distinct reactions using a single pre-catalyst and achieves excellent yields. The study also reports favorable mass productivity, environmental impact factor, solvent intensity, and process mass intensity values.
Article
Chemistry, Analytical
Lindemberg de Jesus Nogueira Duarte, Francisco Wendell Bezerra Lopes, Elayne Andrade Araujo, Ricardo Paulo Fonseca Melo, Eduardo Lins de Barros Neto, Jean Paul Canselier
Summary: This paper studied the removal of phenol, aromatic alcohol, and aromatic amine using cloud point extraction. The oxo-C10E3P4E2 surfactant showed the best results. The ternary phase diagrams demonstrated a large miscibility area favorable for extraction. The results also showed that micellar solubilization is governed by the hydrophobic nature of aromatic organic compounds.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Physical
Supriy Verma, Abhineet Verma, Madalasa Mondal, Monika, Namburi Eswara Prasad, Jyoti Srivastava, Saurabh Singh, Jay Prakash Verma, Satyen Saha
Summary: A series of new room-temperature ionic liquids (RTILs) based on biodegradable pyridinium carboxamide cation and conformationally flexible NTf2 anion have been synthesized. The introduction of amide functionality on pyridinium cation moiety drastically changes the thermophysical properties and plays a crucial role in biodegradability. The dependence of thermal and physical properties on alkyl chain length, as well as the conformational dynamics of NTf2 anion, have been studied and correlated with experimental observations.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Chemistry, Multidisciplinary
Dileep Kumar, Mehraj Ud Din Parray, Farooq Ahmed Wani, Neeraj Dohare, Maroof Ali, Rajan Patel, Abbul Bashar Khan
Summary: This study investigated the effect of alkyl chain length on the mixed micellization behavior of amitriptyline hydrochloride (AMT) with dodecyltrimethylammonium bromide (DTAB)/cetyltrimethylammonium bromide (CTAB) in ionic liquid 1-methyl-3-octylimidazolium chloride (Omim.Cl). The results showed that CTAB exhibits synergistic interaction with AMT, while DTAB shows antagonistic interaction. The change in binding interaction from antagonistic to synergistic with increasing alkyl chain length of the cationic surfactant is explained in terms of the divergence in critical micelle concentration (cmc) and micellar mole fraction (X-m).
JOURNAL OF THE IRANIAN CHEMICAL SOCIETY
(2022)
Article
Engineering, Mechanical
Hong Guo, Brandon Stoyanovich, Junru Pang, Patricia Iglesias
Summary: Although aluminum alloys are widely used, their poor tribological performance and low compatibility with lubricant additives are major limitations. Ionic liquids (ILs), especially Protic Ionic Liquids (PILs), have shown potential as environmentally friendly lubricants. This article studies the tribological behavior of six PILs as additives to a biodegradable oil under aluminum-steel contact, and discusses the influence of alkyl chain length on their lubricating ability.
Article
Chemistry, Multidisciplinary
Nobuya Nishi, Katsunori Seki, Daisuke Takahashi, Kazunobu Toshima
Summary: The study demonstrates the synthesis of a pentasaccharide repeating unit of APEC O1's LPS, showing its potential as an antigen for vaccine development.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Electrochemistry
Nitaro Yuza, Nobuyuki Serizawa, Yasushi Katayama
Summary: The research investigated the anodic dissolution and electropolishing of Sn in an amide-type ionic liquid. It was found that the rate of anodic dissolution was determined by the diffusion of Sn(II) species. Through in-situ observation of a large increase in local viscosity, a shiny surface was obtained, and a decrease in surface roughness indicated that electropolishing of Sn was possible due to the formation of a viscous layer near the electrode.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Electrochemistry
Marjanul Manjum, Nobuyuki Serizawa, Yasushi Katayama
Summary: In this study, electrodeposition of cobalt was investigated in an amide-type ionic liquid under an external magnetic field. The results showed that nanowire-shaped deposits composed of metallic cobalt nanoparticles were formed at 25 degrees Celsius in the presence of the magnetic field.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Chemistry, Physical
Kazuki Yoshii, Takuya Uto, Takakazu Onishi, Daichi Kosuga, Naoki Tachikawa, Yasushi Katayama
Summary: This study investigated the physicochemical properties of room temperature ionic liquids (RTILs) with different ether oxygen atoms through experimental and computational approaches. The results show that the position and number of ether oxygen atoms have a significant impact on the viscosity and transport properties of RTILs, providing valuable insights for the design of functionalized RTILs for various applications.
Article
Electrochemistry
Hsing-Wen Yeh, Nobuyuki Serizawa, Yasushi Katayama
Summary: In this study, attempts were made to recover metallic Co from CoO using BMPTFSA solution, and the electrochemical reduction of [CoCl4](2-) was successfully achieved in the ionic liquid. Co nanowires composed of crystalline Co nanoparticles were successfully deposited under an external magnetic field.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Biochemistry & Molecular Biology
Takanori Kondo, Chihiro Yasui, Taisuke Banno, Kouichi Asakura, Tokuma Fukuoka, Kazunori Ushimaru, Maito Koga, Hiroyuki Minamikawa, Azusa Saika, Tomotake Morita, Daisuke Takahashi, Kazunobu Toshima
Summary: This study investigated the self-assembling properties and structure-activity relationship of chemically synthesized MELs, as well as their recovery effects on damaged skin cells. It was found that the synthetic MELs formed droplets or giant vesicles and the length of the fatty acid chains significantly affected their recovery effects.
Article
Chemistry, Multidisciplinary
Takashi Kitamura, Hirotaka Nakata, Daisuke Takahashi, Kazunobu Toshima
Summary: A novel tumor-related biomarker, a H2O2-activatable photosensitizer 4 based on hypocrellin B (3), was synthesized. Photosensitizer 4 showed selective and effective photo-cytotoxicity against high H2O2-expressing cancer cells under 660 nm light irradiation, demonstrating potential for targeted cancer therapy.
CHEMICAL COMMUNICATIONS
(2021)
Article
Electrochemistry
Ryota Furuya, Tomitaro Hara, Takao Fukunaga, Kiyomoto Kawakami, Nobuyuki Serizawa, Yasushi Katayama
Summary: The research found that the physicochemical properties and coordination states of Li+ with FSA(-) were similar in MPPFSA and MOEMPFSA at various LiFSA concentrations, but the SEI resistance in MPPFSA increased significantly over time, suggesting the SEI in MOEMPFSA was more conductive. Increasing LiFSA concentration improved the cyclability of Li deposition and dissolution, potentially promoting homogeneous growth of Li.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Electrochemistry
Ryota FURUYA, Nobuyuki SERIZAWA, Yasushi KATAYAMA
Summary: The impedance of LiPON thin film and SEI is dependent on the electrode potential, with a decrease in resistance observed with lower electrode potential in certain electrolytes. This is attributed to the doping of Li+ from the electrolyte into thin Li+ conductors to increase Li+ carrier density.
Article
Electrochemistry
Shodai Kato, Nobuyuki Serizawa, Yasushi Katayama
Summary: The formation potentials of solid-electrolyte interphase (SEI) on different electrolytes were investigated in this study. It was found that the thickness of SEI is less than a few nanometers and greatly affects the electrode kinetics.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Electrochemistry
Nobuyuki Serizawa, Suguru Kuwahara, Yasushi Katayama
Summary: The electrode reactions of haloargentates were investigated in an aprotic and hydrophobic amide-type ionic liquid. It was found that silver halides can dissolve in the ionic liquid in the presence of halide ions to form halogenocomplexes. The reduction potential of the halogenocomplexes in the ionic liquid is lower than that in the absence of halide ions. The thermodynamic stability and diffusion coefficients of the halogenocomplexes were also studied.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Electrochemistry
Shodai Kato, Nobuyuki Serizawa, Yasushi Katayama
Summary: The electrode reactions of Ag(I)/Ag and ferrocenium/ferrocene were investigated in an ionic liquid, with the potential of Ag(I)/Ag acting as a reference electrode reaction. The reversible electrode reaction of ferrocenium/ferrocene was observed, and the coordination ability of the ionic liquid was found to be slightly stronger than a different ionic liquid. The diffusion coefficients and standard rate constant for the electrode reactions were determined, providing insights into the properties of the ionic liquid system.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Electrochemistry
Shodai Kato, Nobuyuki Serizawa, Yasushi Katayama
Summary: The formation of solid-electrolyte interphase (SEI) on a glassy carbon electrode was studied in 1-butyl-1-methylpyrrolidinium bis(fluorosulfonyl)amide and 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)amide electrolytes containing Li+, Na+, K+, and Ni2+. The anodic peak potential for the redox reaction of ferrocene changed after electrode holding in the presence of alkali metal ions, indicating the decomposition of the electrolyte. XPS analysis confirmed the decomposition of FSA(-) in the presence of alkali metal ions in the BFSA electrolyte. The change in anodic potential also suggested the formation of homogeneous SEI in the FSA(-)-type ionic liquid. Additionally, the anodic peak potential changed in Ni(TFSA)(2)/BMPTFSA electrolyte, indicating the dissociation of bonds except C-F to form the SEI. The deposition of Ni was inhibited by the SEI formation potential.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Biochemistry & Molecular Biology
Tatsuki Koike, Aoi Sugimoto, Shuhei Kosono, Sumika Komaba, Yuko Kanno, Takashi Kitamura, Itsuki Anzai, Tokiko Watanabe, Daisuke Takahashi, Kazunobu Toshima
Summary: Study showed that Fucoidan derivative 10 exhibited the highest inhibitory activity against SARS-CoV-2 virus, surpassing existing anticoagulants. Furthermore, 10 also demonstrated inhibitory effects on the binding of various mutant virus proteins with heparin, without affecting factor Xa that could lead to adverse anticoagulant activity.
RSC MEDICINAL CHEMISTRY
(2021)
Article
Electrochemistry
Nobuyuki Serizawa, Kojiro Wada, Naoki Tachikawa, Yasushi Katayama
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2020)
